There are some cynics who confuse judgmental with rationale, so let me explain the difference between these two for them. When a decision is made on the basis of limited information or the information which is literally non-existent that is called judgmental. But if there is substantial amount of evidence and information about a certain issue and decision is made on the basis of those evidence then it is termed as a rationale decision.
As a matter of fact both are important there might be some cases where you have to be judgmental because you can not always analyze the whole information, pros & cons and all the dimensions of the picture so there you have to make good use of your judgmental qualities. Being rationale is always good, but the problem with this option is that it takes too much time but the accuracy of rationale based decisions is far more than being judgmental.